Composer
Director
Screenwriter
Main Role
- Moon So RiDang Ja YeongMain Role
- Jung Jae YoungChoi Ban SeokMain Role
- Lee Sang YeobHan Se KwonMain Role
- Kim Ga EunSeo Na RiMain Role
Support Role
- Kim Nam HeeShin Han SooSupport Role
- Ahn Nae SangNoh Byung GukSupport Role
- Park Won SangPaeng Soo GonSupport Role
- Park Sung GeunGong Jung PilSupport Role
- Kim Joong KiKo Jeong ShikSupport Role
- Jo Bok RaeHan Seung Gi [Chairman]Support Role
- Cha Chung HwaShin Jung AhSupport Role
- Dong Hyun BaeKi Jeong HyunSupport Role
- Lee Seo JoonAhn Jun SooSupport Role
- Cheon Hee JooGye Bo RamSupport Role
- Lim Il GyuOh Jae IlSupport Role
- Jung Sung HoonYoon Gi JoonSupport Role
- Kim Ye EunOh Hye YeonSupport Role
- Lim Hyoun SooSo Sang WookSupport Role
- Choi Myung GilChoi Hye Soo [Na Ri's mother]Support Role
- Baek Min HyunAhn Joon Soon [Member of robot cleaner development team]Support Role
- Jung Yeo JoonGil Chang Hwan [Member of QA Team]Support Role
- Oh YongPyeon Dong IlSupport Role
- Kim Jin HoBae Jung TakSupport Role
- Jung Ye NaChoi Seon Yi [Ban Seok's daughter]Support Role
- Nam Neung Mi[Ban Seok's mother]Support Role
- Yang Jae HyunYoo Woo JongSupport Role
- Son Ye JiPark Da Som [Purchasing department senior]Support Role
- Choi Yoon JungDang Min Young [Ja Young's sister]Support Role
- Koo Min HyukJeon Myung Woo [Development team 3 manager]Support Role
- Kim Yun SeoJeong Seong EunSupport Role
- Kim Gyu DoCha Gyu Won [Development team #3 senior]Support Role
- Oh Yoo NaHeo Ga Young [Product Planning]Support Role
- Jung Hyun ChulSung Do GyunSupport Role
Guest Role
- Song Yo SepJin Seung Ho (Ep. 1)Guest Role
- Chu Eun KyungJo Sun Young (Ep. 1)Guest Role
- Choi Deok MoonKim Young Soo (Ep. 1, 15)Guest Role
- Jeon Yeo JinHeadhunter (Ep. 3)Guest Role
- Kim Han JoonMr. Jung [AA Electronics] (Ep. 3)Guest Role
- Kim Shin Yul[Executive] (Ep. 5)Guest Role
- Kim Kyung MinShin Jong Sik [QK Korea] (Ep. 8)Guest Role
- Lee Sung Il[Auditor] (Ep. 8-9)Guest Role
- Park Ki RyungPark Ki Ryoong (Ep. 8, 16)Guest Role
- Kwak Min SeokLee Hyun Joong (Ep. 10)Guest Role
- Jang Dae Woong[Executive] (Ep. 10)Guest Role
- Lee Jun I[Gas station attendant] (Ep. 10)Guest Role
- Son Seon Geun[Hanmyeong HQ executive] (Ep. 10)Guest Role
- Jung Dong Gyu[Mayor] (Ep. 11)Guest Role
- Jang Joon HyunLee Kyung Hoon (Ep. 12)Guest Role
- Kwon Hyuk Soo[Han Seung Gi's uncle] (Ep. 14)Guest Role
- Jeong Young Do[Reporter] (Ep. 14)Guest Role
- Kim Sang IlMr. Yoon [Hanmyeong E & C] (Ep. 15)Guest Role
- Kim Jae IlKang Jae Hyuk [GR Tech] (Ep. 16)Guest Role
- Hwang Tae KwangSon Tae Sung (Ep. 16)Guest Role
- Uhm Hye SooLee Han Sol (Ep. 16)Guest Role
- Park Byung Wook[Executive] (Ep. 16)Guest Role
- Kim Pan Kyum[CEO's assistant] (Ep. 16)Guest Role
- Park Chang WooDong GyooGuest Role
- Yoo Sang JaeSon Hyung Ki [Finance team]Guest Role
- Park Keun RokHan Seung Jin [Hanmyeong E & C ]Guest Role
- Kim Jin Goo[Hanmyeong Electronics HQ executive]Guest Role
- Yoo Jung RaeEo Hae Mi [Research & Development]Guest Role
- Choi Yoon JungDang Min YeongGuest Role
- Yoon Hae Joo[Director Eun's voice]Guest Role
- Kang In GiNo Jae YeolGuest Role
- Park Jin SooSeo Yoon TaekGuest Role
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